| By Lennert Buytenhek <buytenh@wantstofly.org> |
| Adds support for arm*b-linux* big-endian ARM targets |
| |
| See http://gcc.gnu.org/PR16350 |
| |
| --- gcc-3.3.5-dist/gcc/config/arm/linux-elf.h |
| +++ gcc-3.3.5/gcc/config/arm/linux-elf.h |
| @@ -30,17 +30,34 @@ |
| /* Do not assume anything about header files. */ |
| #define NO_IMPLICIT_EXTERN_C |
| |
| +/* |
| + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-* |
| + * (big endian) configurations. |
| + */ |
| +#if TARGET_BIG_ENDIAN_DEFAULT |
| +#define TARGET_ENDIAN_DEFAULT ARM_FLAG_BIG_END |
| +#define TARGET_ENDIAN_OPTION "mbig-endian" |
| +#define TARGET_LINKER_EMULATION "armelfb_linux" |
| +#else |
| +#define TARGET_ENDIAN_DEFAULT 0 |
| +#define TARGET_ENDIAN_OPTION "mlittle-endian" |
| +#define TARGET_LINKER_EMULATION "armelf_linux" |
| +#endif |
| + |
| /* Default is to use APCS-32 mode. */ |
| #undef TARGET_DEFAULT |
| -#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS) |
| +#define TARGET_DEFAULT \ |
| + ( ARM_FLAG_APCS_32 | \ |
| + ARM_FLAG_MMU_TRAPS | \ |
| + TARGET_ENDIAN_DEFAULT ) |
| |
| #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6 |
| |
| -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p" |
| +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p" |
| |
| #undef MULTILIB_DEFAULTS |
| #define MULTILIB_DEFAULTS \ |
| - { "marm", "mlittle-endian", "mhard-float", "mapcs-32", "mno-thumb-interwork" } |
| + { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mapcs-32", "mno-thumb-interwork" } |
| |
| #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__" |
| |
| @@ -100,7 +117,7 @@ |
| %{rdynamic:-export-dynamic} \ |
| %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \ |
| -X \ |
| - %{mbig-endian:-EB}" \ |
| + %{mbig-endian:-EB} %{mlittle-endian:-EL}" \ |
| SUBTARGET_EXTRA_LINK_SPEC |
| #endif |
| |
| --- gcc-3.3.5-dist/gcc/config.gcc |
| +++ gcc-3.3.5/gcc/config.gcc |
| @@ -710,6 +710,11 @@ |
| ;; |
| arm*-*-linux*) # ARM GNU/Linux with ELF |
| tm_file="dbxelf.h elfos.h arm/elf.h arm/linux-gas.h arm/linux-elf.h arm/aout.h arm/arm.h" |
| + case $target in |
| + arm*b-*) |
| + tm_defines="TARGET_BIG_ENDIAN_DEFAULT=1 $tm_defines" |
| + ;; |
| + esac |
| tmake_file="t-slibgcc-elf-ver t-linux arm/t-linux" |
| extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o" |
| gnu_ld=yes |
